How is atomic mass calculated

Multiply mass by % and then add all

How is Iodine-131 used to diagnose thyroid disease?

Scanned to show thyroid function

Rutherford concluded from his experiment that

Atoms in gold are mostly empty space

From Thomson's Cathode Ray Tube studies what did he contribute to atomic theory?

Atoms contain negative particles

Which of the following statements are true

Protons are positive with a mass of 1 amu

Nucleus of an atom is

central core with protons and neutrons

Which type f nuclear radiation is the most penetrating and why?

Gamma b/c no mass & high energy

Democritus characterized atoms as

Indivisible, indestructible particles

Dalton's Postulates related atoms to elements in the following

All elements composed of different atoms

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Duplicate of Cypress Park Chemistry-Unit 7 Review 2019

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Atomic Structure, Theory & Nuclear Chemistry

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Questions 30

Answers

1
What unit is used to measure weighted average atomic mass?
microgram
nanogram
amu
angstrom
2
Fission reactions involve
absorption of energy
joining of nuclei
splitting of nuclei
loss of energy
3
Which is correct with a mass of 230 and atomic number 88
p= 88, n=142, e=88
p= 230, n=230, e=230
p= 88, n=88, e=88
p= 88, n=230, e=88
4
What discovery did Thomson make that improved Dalton's Theory?
Positively charged nucleus
Negatively charged electrons
Atoms combine in simple ratios
Atoms always in motion
5
How is atomic mass calculated
Multiply mass by % and then add all
Add all masses and divide by the number of isotopes
Add the protons and neutrons
Multiply the mass by the most common isotope
6
How are cations formed?
Atoms gain electrons
Electrons have energy change when they move orbitals
Atoms share electrons
Atom loses valence electrons
7
How is Iodine-131 used to diagnose thyroid disease?
Iodine free diet
Thyroid gland removed
Radiation detector used to show levels of iodine
Scanned to show thyroid function
8
Rutherford concluded from his experiment that
Atoms in gold are mostly empty space
Positive particles in gold were distributed throughout atom
Alpha particles were attracted to negative particles
Alpha particles were attracted to positive particles
9
What nuclear particle does this represent?
Alpha
Neutron
Gamma
Beta
10
The following isotopic notation represents
Protium
Deuterium
Tritium
Neuterium
11
From Thomson's Cathode Ray Tube studies what did he contribute to atomic theory?
Atoms contain negative particles
Atoms contain positive particles
Atoms contain no particles
Atoms contain neutral particles
12
What element is in the image
Helium
Beryllium
Lithium
Hydrogen
13
All atoms of the same element have the same
neutron number
mass number
electron number
proton number
14
The atomic radius of Li, Na, & Rb are 7, 18, and 50 pm respectively. What is K?
6 pm
60 pm
25 pm
2 pm
15
How do cations form?
Atoms share electrons
Atoms gain electrons
Atoms have electrons move orbitals
Atoms lose electron
16
Which of the following statements are true
Protons are positive with a mass of 1 amu
Nucleus is positive with mass of 1 amu
Neutrons are negative with mass of 1 amu
Electrons are negative with a mass of 1 amu
17
Nucleus of an atom is
central core with protons and neutrons
central core with nucleus and protons
central core with electrons and protons
central core with neutrons and electrons
18
Which type f nuclear radiation is the most penetrating and why?
Gamma b/c greatest mass and no charge
Alpha b/c greatest mass and charge
Gamma b/c no mass & high energy
Beta b/c low mass and negative charge
19
What type of particle?
Gamma
Alpha
Beta
Neutron
20
What are three types of subatomic particles?
Ions, Isotopes, Neutrons
Protons, Electrons, Neutrons
Muons, Ions, Electrons
Protons, Electrons, Nucleus
21
Democritus characterized atoms as
Particles that heat could destroy
Particles could be divided
Energy not matter
Indivisible, indestructible particles
22
Which is the advantage of using fusion reactor to produce electricity?
Low cost
Tremendous energy
All
Minimal waste
23
Sum of the protons and neutrons in an atom equals the
Atomic Mass
Mass number
Atomic number
Average Atomic Mass
24
The scientist to develop a model of the atom described as the plum pudding model was
Rutherford
Thomson
Dalton
Chadwick
25
A Fusion reaction
join nuclei
splitting nuclei
involve electrons only
take up energy
26
If Sulfur gains two electron what will the charge be on this ion?
-1
+2
-2
+1
27
What type of particle
Beta
Gamma
Alpha
Neutron
28
What did Thomson contribute to atomic theory?
Electrons are negative
Positive charge in the core
Electrons have quantized amounts of energy
Negative charge is in the core
29
Dalton's Postulates related atoms to elements in the following
All elements composed of different atoms
All element composed of two or more atoms
All elements composed of identical atoms
none
30
Calculate the average atomic mass: lithium, 6.017 amu, 7.30% and 7.018 amu, 92.70%.
6.5057 amu
6.9449 amu
.4392 amu
7.2233 amu

Duplicate of Cypress Park Chemistry-Unit 7 Review 2019 Flashcards | StudBud